Optimization of Direct Current Magnitude against Braking Time in A No Load 3-Phase Induction Motor Using Matrix Laboratory Simulink

The use of a braking system on an induction motor is often needed to stop the rotation of the motor rotor quickly, braking can be done mechanically or electrically. Injecting direct current into the stator coil after the power supply has been removed is one of the most effective and safe methods to use to stop rotor rotation and avoid mechanical loss in the motor rotor. The braking system is carried out by making the magnetic field of the motor stationary. In this study, direct testing will be carried out on the induction motor and simulation using Matlab Simulink R2017b Software, there are 6 stator winding configurations in the braking system used. based on the results obtained, the c configuration circuit obtained the fastest braking time of 1.42 seconds in direct testing and 1.2 seconds in simulation with an injection current of 1.97 A. Configuration a is highly recommended because with a relatively small injection current of 1.14 A, it is able to produce brake times of 1.82 seconds in direct testing and 1.75 seconds in Matlab simulations. Using the genetic algorithm optimization method with a braking time target of 1.21 seconds, the current that needs to be injected is in the interval 1.65 A to 1.8 A.